Stem cells are found in multicellular organisms. They have two broad categories - embryonic stem cells and adult stem cells. They are generally found in undifferentiated form and can be transformed into specialized cells. In adults, they act as a repair system of the body. These cells are frequently used in medical therapies such as bone marrow transplant, etc. The viability of stem cell therapy is being investigated to treat diseases such as cancer, diabetes, rheumatoid arthritis, osteoarthritis, vision impairment, parkinson's disease, impaired hearing, etc. This book covers in detail some existent theories and innovative concepts revolving around developments in the field of stem cell research. It is an upcoming field of medical science that has undergone rapid development over the past few decades. This text aims to bring forth studies related to all the significant aspects of stem cells along with technological progress that will have future implications. For all those who are interested in this area of study, this book can prove to be an essential guide.